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(No Model.) 2 Sheets--Sheet 1,' P. E. GRIMM. APPARATUS FOR DRY'ING STARGH REFUSE, 65o. No. 440,262.

Patented Nov. 11, 1890.

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P. H. GRIMM.

APPARATUS'POR DRYING STARGH REFUSE, 110. No. 440,262. 'Patented Nov. 11, 1890.

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EN N 0%@ gig L 6% @13 9%@ Ng; 14 @h @1%D Ql /f PAUL H. GRIMM, OF GLEN COVE, NEW YORK, ASSIGNOR TO THE GLEN COVE MANUFACTURING COMPANY, OF SAME PLACE.

APPARATUS FOR DRYING STARCH REFUSE, 80G.

SPECIFICATION forming part of Letters Patent No. 440,262, dated November 11, 18.90.

Application filed July 5, 1888. Serial No. 279,004. (No model.)

To @ZZ whom it may concern.-

Be it known that LPAUL H. GRIMM, of Glen Cove, inthe county of Queens and State of New York, have invented a new and useful Improvement in Apparatus for Drying Starch Refuse and other Substances, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to apparatus for drying solid or granular materials, more particularly starch refuse, in which the drying chamber or kiln is provided with a succession of doors-one above another-formed of tilt- .ing floor-sections.

I will now proceed to describe the improvement, and point out its novel features in claims.

In the drawings, Figure l represents a Vertical longitudinal sectional view of a drying apparatus embodying my improvement and showing the interior of a drying-chamber or kiln; Fig. 2, a transverse vertical sectional view of Fig. l; Fig. 3, a longitudinal vertical sectional view of the same apparatus, showing the interior of an air-heating chamber. Fig. 4 represents a longitudinal sectional view of a perforated tilting floor-section, a tilting arm and rod, and a steam-heating pipe, to which the floor-section is pivoted; Fig. 5, a transverse vertical section corresponding with Fig. 4. Fig. 6 represents a plan view of a reticulated tilting floor-section. Fig. 7 represents a longitudinal sectional view of a barred or grated tilting Hoor-section, and Fig. S a plan view of Fig. 7.

Like letters of reference indicate corresponding parts in all the figures.

C C indicate a series of drying-chambers or kilns arranged side by side and having floors one above another, upon which the material to be dried is placed, and having steam-heating pipes beneath or between the several floors.

A A indicate the steam-heating pipes, and B B the tilting floor-sections pivoted thereto, there being represented one straight pipe for each floor-section, and the pipes being immediatelybeneath their respective floor-sections, and consequently in close proximity to the material to be heated or dried, and the heat of the pipe is thereby more fully utilized and more eifective than if otherwise applied.

To still further insure the direct and indirect application to the material of the heat from the steam-pipes, the tilting floor-sections may be barred or grated, perforated or reticulateddas, for example, as represented in Figs. 4, 5, 6, 7, and 8. Figs. 4 and 5 represent a floor-section consisting of frame a, covered with a sheet b of perforated metal; Fig. 6, a 6o similar frame a', covered with a sheet b of wire cloth or netting; and Figs. 7 and 8, a grated or barred Hoor-section formed of a frame a2, parallel bars or rods h2, such as may be formed by sawing numerous parallel cuts through a door plank or board, the parts between the cuts forming the bars h2 of such barred or grated Hoor-section.

c c designate connecting-pipes outside of the drying-chambers C, through which the 7o steam-heating pipes communicate with each other. Said connecting-pipes c c are represented as contained in an air-heating chamber or passage D, consisting of the space between the side of the drying-chamber and an outer wall or casing E.

F represents an air-circulating device-in this example a fan or blowen-interposed between said drying-chamber C and the airl heating chamber or passage D for exhausting 8o the air from the latter and forcing it into the former. Y

In order to form an air-passage at one end of each door on the side of the heating-cham, ber opposite to that of the air-passage through. the fioor next above or below it, whereby the` air in its upward passage will be caused to Vflow alternately from one side to the other of the heating-chamber or kiln, the pipe of each floor-section is represented as located directly 9o opposite the edges of the Hoor-sections next above or below it-that is to say, directly opposite the middle of the space between the nearest pipes of the iioors above or below.

G G indicate feed-hoppers, situated at one end or one side of and above the top floor of each chamber C to deliver the moist starch refuse or other material upon that end of the floor.

H H indicate endless chains of slats Y or roo sweeps above and parallel with the top doors for spreading the moist material supplied by the hoppers evenly upon said floors.

I indicates the inlet-pipe, from which steam Hows into the pipesA of the upper tloor, each of said pipes A having a separate connection therewith and discharging at the opposite end into a connection-pipe c, communicating with a pipe A of the floor below, which in turn discharges through asecond connectingpipe c into a pipe A of the next lower iloor, and so on to the lowest iioor, the pipes AA of which communicate with the outlet-pipe J. In this manner each opening in the inlet-pipe is connected by one continuous pipe with the corresponding opening into the outlet-pipe, said continuous pipe consisting' of one pipe A ineach floor and the several connectingpipes, wherebythe said pipes of each floor communicate one with another.

K K designate division-plates or partitions extending from opposite sides alternately of the air-heating chamber or passage D part Way across the same, whereby the air flowing through the passage may be conducted or deiected alternately from one side to the other of the passage D. Every part of the air flowing through the passage will thus be brought repeatedly in contact with the heated connecting-pipes.

In the example of my improved apparatus represented in the drawings the drying chambers or kilns are placed side by side, forming a series of four chambers. The inner or partition walls may be formed of wooden studding or frames CZ and sheet-iron sheathing e; or the walls and partitions may be constructed entirely of either iron or wood. If of the latter, the holes for the passage of pipes should be shielded with iron. The several dryingchambers are open at the top for the free escape of the vapors and air. Below they all open into a single hopper-shaped receptacle L, into which the dried material is dumped from the lower floors, and from which it is driven oit through a discharge-opening f. All the drying-chambers O of the series have a common inlet-pipe I and a common outletpipe J,v located at the top and bottom, respectively, and on the same side of the series. Each steam heating pipe extends directly thro-ugh the four drying-chambers, the airheating chambers being two in number only,

v in g-chambers.

The endless chains of slats or sweeps H H are represented as carried by chain-wheels jj, fixed on a driving-shaft lo, and a driven shaft parallel therewith. On the overhanging end of the driving-shaft 7c a chain-wheel j is represented, to which power may be applied. The slats or sweeps m may be of wood or metal and attached to endless chains n.

P designates tilting rods or levers placed transversely to the tilting floor-sections and below them, to which the tilting-arms o are pivotally attached. A tilting-rod P will be required to each floor; but they are not all represented in the figures.

p p designate handles to the tilting-rods,

projecting through the end wall of the cham-` bers to be grasped by the hand, to be pulled or pushed in or out to dump the tilting sec tions or return them to the horizontal position. It will be seen that the handles p for the tilting-rods P extend alternately upon opposite sides of the heating-chamber. By this means it will be readily seen that when, for instance, the upper of the handles p is drawn outwardly the Hoor-section with which it operates will be tilted so as to dump the material downwardly and at an angle upon the next oor below, the angular direction in which the material is dumped being toward the right of Fig. l. When, on the contrary, the material is to be dumped from the door which just received it, and the handle p to the right of' Fig. l is withdrawn, the tloor-section will be tilted in such manner as to dump the material downwardly upon the next door and in an angular direction toward the left of Fig. l. By this alternate means of dumping the ma terial first toward the right and then toward the left, or conversely, an important advantage is secured, in that accumulations of material upon one side of the chamber in heaps is avoided, which would not be the case were all the door-sections dumped in one direction. This is also advantageous because it admits of such an arrangement of the tloor-sections that openings will be left at dierent ends of adjacent Hoor-sections, in order that the upwardly-passing current of air and vapor may pursue a circuitous course. The levers or rods P may or may not project through the wall. In the latter case a hand hole or opening maybe made in the wall or casing of the chamber and the hand may reach insidev and grasp the lever therein, and after the contents of the floor is dumped the hand may be withdrawn and the handhole closed.

The operation of my improved drying apparatus may be continuous. The moist or wet starch refuse or other material to be dried enters at the top and drops out, when thoroughly dried, at the bottom. The bottom floor, when the material thereon is dry enough, is dumped first, and the floor next above is dumped onto it, and so on to the` top. Whenever the top door is dumped onto the iioor below it, fresh material may be immediately spread upon the said upper floor. f

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What I claim as new, and desire to secure by Letters Patent, is

1. The combination, with a drying-chamber and a vertical series of intercommunicating compartments within the chamber, of airchambers located at the opposite ends of the drying-chamber, the air-chambers communicating with the outside air at their upper portions and with the drying-chamber at their lower portions, steam-pipes extending back and forth along the oors of the several oompartnients of the drying-chambers and projecting into the air-chambers at the ends of the drying-chamber, and a force-draft device arranged to draw the air from the lower portions of the air-chambers and discharge it into the lower portion of the drying-chamber, substantially as set forth.

2. The combination,witl1 a dryingcharnber, a vertical series of floor-sections, stea1n-pipes arranged in staggered order and forming supports for the hoor-sections, and air-chambers located at the opposite ends of the dryingchamber, said air-chambers communicating with the outside air at their upper portions and with the drying-chamber at their lower portions, of steam-pipe connections located within the air-chambers, each pipe-section connecting a section of steam-pipe with an` other section of the saine pipe located obliquely above or below it, division-plates located at intervals within the air-chambers, and a force-draft apparatus drawing air from the lower portion of the air-chambers and discharging it into the drying-chamber, substantially as set forth.

PAUL H. GRIMM. Witnesses:

FREDK. HAYNES, MINERT LINDEMAN. 

